Frequently Asked Questions

The ideal deck size depends on how you plan to use it. For dining (table + 4-6 chairs), plan for at least 12x14 feet. For a grill station plus seating, 14x16 feet works well. If you want multiple zones — dining, lounging, and cooking — consider 16x20 feet or larger. NB properties often have generous lot sizes, so space usually isn't the constraint. Consider your home's proportions: a deck should complement the house, not overwhelm it. Most NB deck builders recommend starting with a rough layout of your furniture and activities, then adding 3-4 feet of circulation space around each zone.

In most NB municipalities, yes — you need a building permit for any deck that is attached to your house or more than 24 inches (600mm) above grade. Small, freestanding, ground-level platforms may be exempt, but rules vary by municipality. In Fredericton, Moncton, and Saint John, permits are required for most deck construction. The permit process typically involves submitting construction drawings showing footings, framing, and railing details, and inspections at the footing and final stages. Your deck builder usually handles the permit application. Budget $100-300 for permit fees and 2-4 weeks for approval. Building without a permit can result in fines, forced removal, or problems when selling your home.

For New Brunswick, consider south or southwest-facing decks to maximize sun exposure during our shorter outdoor season (May-October). Include a covered section or pergola for rain protection — NB gets significant rainfall. Avoid fully enclosed lower levels that trap moisture and snow. Good design features for NB: proper slope for water drainage (1/8 inch per foot away from the house), adequate joist spacing for airflow underneath, and snow-shedding railing designs. Multi-level decks work well on NB's often-hilly terrain, turning a slope into usable outdoor space.

Each material has trade-offs in NB's harsh climate. Pressure-treated (PT) lumber is the most affordable ($25-40/sq ft installed) and handles moisture well, but needs staining every 2-3 years and can crack from freeze-thaw cycles. Cedar ($35-55/sq ft) is naturally rot-resistant and beautiful, but softens over time and needs annual maintenance. Composite ($45-75/sq ft) costs more upfront but requires virtually zero maintenance and lasts 25-50 years — it's become the top choice for NB homeowners who want to enjoy their deck, not maintain it. For NB specifically, composite handles our 100+ annual freeze-thaw cycles, Maritime humidity, and UV exposure better than any wood product.

Both are excellent choices for NB. Trex Transcend ($55-70/sq ft installed) offers the widest color selection and strong fade/stain warranties. TimberTech Pro ($60-75/sq ft) has a slightly more realistic wood grain texture. For most NB homeowners, the difference comes down to color preference and local availability — both brands handle our climate equally well. Trex tends to be more readily available through NB lumber yards and big-box stores. TimberTech's AZEK line (PVC, not composite) is worth considering if your deck gets significant moisture exposure — it's 100% moisture-proof. Both offer 25-year fade and stain warranties that cover NB's climate conditions.

Pressure-treated lumber is the standard and recommended choice for deck framing (posts, beams, joists) in New Brunswick. Modern PT lumber uses MCA (micronized copper azole) treatment that resists rot, insects, and ground contact — critical for NB's wet climate. Cedar, while naturally rot-resistant for decking boards, doesn't have the structural strength ratings needed for framing members under NB Building Code. All ground-contact applications (posts in concrete, beams near grade) should use PT lumber rated for ground contact (look for the UC4A stamp). Even if you're building a cedar or composite deck surface, the framing underneath should be pressure-treated.

In NB's climate, most wood decks need restaining every 2-3 years. Our combination of 100+ freeze-thaw cycles, Maritime humidity, heavy snow loads, and summer UV breaks down finishes faster than milder climates. Signs it's time: water no longer beads on the surface, wood looks grey or weathered, or you can see bare wood where stain has worn away. Semi-transparent stains typically last 2-3 years, while solid stains may last 3-4 years but can peel. The best time to stain in NB is late May through September when temperatures are consistently above 10°C and no rain is forecast for 24-48 hours. Avoid staining in direct hot sun — it causes the stain to dry too quickly and not penetrate properly.

Fall deck prep is essential in NB. Before the first snow: sweep all leaves and debris (trapped moisture causes rot), clean between boards, check for any loose boards or protruding nails that could catch snow shovels, and ensure drainage paths are clear. For wood decks, apply a water repellent if your stain is wearing thin — it'll buy protection until spring restaining. Move planters off the deck (freeze-thaw cracks them and stains the deck). Use plastic furniture glides under any furniture left out. In winter, use a plastic shovel — never metal — and shovel with the boards, not across them. Avoid salt-based ice melters on wood and composite decks; use calcium chloride or sand instead.

Composite decks need minimal but not zero maintenance. Twice a year (spring and fall), clean with soap and water or a composite deck cleaner to prevent mold and mildew buildup — NB's humidity makes this important. Remove debris from between boards to maintain airflow. Clean up food spills promptly to prevent staining (especially on lighter colors). You never need to stain, seal, sand, or paint composite decking. For tougher stains, most manufacturers recommend specific cleaners — avoid bleach-based products. In NB, the main maintenance issue is mold/mildew on the shaded, north-facing sections of the deck. A spring cleaning with a composite-safe cleaner and a soft brush handles this easily.

Deck footings in NB must extend below the frost line to prevent heaving. The required depth varies by region: 1.2 metres (4 feet) in southern areas like Moncton, Saint John, and Fredericton; 1.4 metres in central NB; and up to 1.5 metres (5 feet) in northern areas like Bathurst, Edmundston, and Campbellton. These depths are set by the NB Building Code based on local frost penetration data. Footings that don't reach below frost line will heave upward during winter, causing the deck to shift, crack, and potentially separate from the house. Most NB deck builders use Sonotubes (cardboard forms) filled with concrete, with a minimum 10-inch diameter for standard residential decks. Helical screw piles are an increasingly popular alternative — they're installed mechanically, don't require excavation, and work well in NB's rocky and clay-heavy soils.

NB Building Code requires guardrails (railings) on any deck surface 600mm (24 inches) or more above finished grade. Key requirements: minimum guardrail height of 900mm (36 inches) for residential, maximum baluster spacing of 100mm (4 inches) — the '4-inch sphere' rule, guards must resist a minimum horizontal load of 0.5 kN/m applied at the top, no climbable horizontal elements in the lower 600mm (to prevent children climbing), and openings in guards must not allow passage of a 100mm sphere. For stairs, a graspable handrail is required on at least one side, with a diameter between 32-38mm. These requirements apply province-wide and are enforced during building inspections.

NB Building Code requires residential decks to support a minimum live load of 1.9 kPa (approximately 40 pounds per square foot). This accounts for people, furniture, snow, and other loads. However, hot tubs are a common exception — a filled hot tub can weigh 3,000-5,000 pounds, requiring reinforced framing, additional footings, and potentially larger beams. If you're planning a hot tub, tell your deck builder upfront so the structure is designed accordingly. Snow load is also a consideration in NB: ground snow loads range from 2.0-3.5 kPa depending on your location. While decks shed snow more readily than roofs, covered deck sections need to account for snow accumulation. Your deck builder should size all framing members based on NB's specific loading requirements for your municipality.

Deck costs in NB depend heavily on material choice, size, and complexity. For a standard 12x16 (192 sq ft) deck: pressure-treated lumber runs $4,800-$7,700 ($25-40/sq ft installed), cedar costs $6,700-$10,600 ($35-55/sq ft), and composite ranges from $8,600-$14,400 ($45-75/sq ft). These prices include footings, framing, decking, basic railing, and stairs. Add-ons that increase cost: multi-level designs (+20-30%), curved or angled sections (+15-25%), premium railings like glass or cable (+$100-200/linear ft), built-in benches or planters (+$1,000-3,000), and pergolas (+$3,000-15,000). NB prices are generally 10-15% lower than Ontario or BC due to lower labour costs, but material prices are comparable since most lumber and composite products ship from the same suppliers.

For most NB homeowners, yes — composite pays for itself over 10-15 years. Here's the math: a 12x16 PT deck costs ~$6,000 installed plus ~$500/year in staining, repairs, and eventual board replacement. Over 20 years: ~$16,000 total. A composite deck of the same size costs ~$11,000 installed with virtually $0 annual maintenance and a 25-50 year lifespan. Over 20 years: ~$11,500 total (just occasional cleaning supplies). The break-even point is typically year 10-12. Beyond dollars, consider your time: NB's short staining window (May-September, dry days only) means scheduling annual maintenance is a real hassle. Composite lets you spend summer weekends on your deck, not maintaining it.

The most affordable deck approach in NB: ground-level, pressure-treated lumber, simple rectangle shape, and DIY-friendly design. A 10x12 ground-level PT deck can be built for as little as $1,500-2,500 in materials if you do the work yourself. Ground-level decks may not require a permit in some NB municipalities (check locally), don't need deep footings (deck blocks on compacted gravel suffice), and skip railing requirements (under 24 inches above grade). However, be realistic about DIY: structural work like framing, footings, and ledger connections should be done by a pro if you're not experienced. Mistakes in these areas can be dangerous and expensive to fix. Many NB homeowners compromise: hire a pro for framing and footings, then install decking boards and railing themselves to save $2,000-4,000.

Deck construction in NB is governed by the National Building Code of Canada as adopted by New Brunswick, enforced through municipal building inspection departments. Key code requirements: footings must extend below frost depth (1.2-1.5m depending on region), guardrails required on decks 600mm+ above grade (900mm minimum height, 100mm maximum baluster spacing), ledger boards must be properly flashed and lag-bolted to the house framing (not just nailed), minimum joist sizes based on span and spacing, and stairs must have consistent rise/run with a graspable handrail. The building inspector will typically do two inspections: one at the footing/framing stage (before decking goes on) and one final inspection. Passing both is required to close the permit.

If you're hiring a contractor, they should have WorkSafeNB coverage — this is worker's compensation insurance that protects both their employees and you as the homeowner. In New Brunswick, construction businesses are required to register with WorkSafeNB. If an uninsured worker is injured on your property, you could be held liable. Ask any deck builder for their WorkSafeNB clearance letter before work begins. If you're doing DIY work, WorkSafeNB doesn't apply to homeowners working on their own property. However, if you hire casual day labourers, you may have WorkSafeNB obligations as an employer. The safest approach: hire a licensed, insured deck builder with current WorkSafeNB clearance.